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View Diary: Staring at the Sun (34 comments)

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  •  As a general rule, hotter substances produce (4+ / 0-)

    shorter wavelengths with higher energy. This is a key part of global warming theory; the sun radiates at the earth in many frequencies, but a lot of the energy is in the visible frequencies. The energy radiates (NOT reflected) by the earth back to space is longer infrared wavelengths. A greenhouse gas is one that is (nearly) transparent to visible light but absorbs some or all  infrared wavelengths.

    The reason a blue-ray disc has more content than a standard DVD is that blue has a shorter wavelength than red, so a blue laser can discern a finer resolution than a red one.

    Economics is a social *science*. Can we base future economic decisions on math?

    by blue aardvark on Tue Jan 29, 2013 at 01:51:18 PM PST

    •  That's right. (3+ / 0-)

      The greenhouse gases trap the energy within the atmosphere. Ideally, we would have an atmosphere allowing a balance of energy received by Earth and energy re-radiated back to space. The net balance now is toward less re-radiated back to space. We are getting warmer.


      Predicting is hard...especially the future. ~ Y. Berra

      by jim in IA on Tue Jan 29, 2013 at 02:10:16 PM PST

      [ Parent ]

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